Environmental interfaces

This chapter focuses on the DKJTCALL API to IBM Z® Table Accelerator. This interface operates in batch, CICS®, and IMS TM environments, with tables in either a local TSR or shared TSR (VTS-TSR).

When a IBM Z Table Accelerator table is opened in any environment, storage is allocated within a TSR and a copy of the table is loaded into the TSR from the IBM Z Table Accelerator library. The TSR is either a local Data Space allocated at region initialization or a shared Data Space allocated during VTS-TSR initialization. Only one region may have a table open for write but a table may be opened for read in multiple regions.

The following sections describe the operation of DKJTCALL in each supported environment.